36" CRT Toshiba has that vertical issue mentioned on here a bit

When we turn the tv on, either it comes on right away and goes to the problem shortly afterwards or immediately the problem occurs when the TV is turned on (after it's been off for a while).
The screen starts out black, and can hear the sound, then a thin white line across the screen appears, then it starts growing above and below until it finally fills the entire screen. I can make it appear full sized if I lightly tap the TV on the side though.
Question 1: Is it bad to be tapping the TV on the side, where more damage than good will come of it, and just let the picture slowly get to full-sized?
Question 2: Should we get it repaired now, or wait until it progressively gets worse? It only happens once each time when we turn the tv on, or a few minutes later, and then it's fine after that. In other words, is it worth spending a few hundred $ on this right now, or wait until it gets worse, and how much worse can it get?

2 Answers

Anonymous

Re: 36" CRT Toshiba has that vertical issue mentioned on...

Noone - it's still doing it about the same amount of time, slightly worse, after 5 months...not sure when is the right time to get it fixed (maybe when it completely goes??) - right now it's just an annoyance. Can sometimes get the pic and sound back quicker if the back of the TV is lightly tapped with a finger, but that probably isn't a good idea.
My question is this: Is it worth getting a 9 yr old TV repaired or just donate it / get rid of it? i.e. Ballpark cost on getting something like this repaired?? Anything over $150 or so isn't worth it.

Your problem is most likely caused by a cold solder joint in the vertical circuit. Normally this is easy to find and correct. The problem will only get worse over time, but not likely for more damage to occur.

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Most problems indicated by your description involved the Vertical IC. With your post "tap...pop back up" signifies a loose connection or to be more specific a cold solder. I suspect that no part(s) need top be replaced but would however require re-application of heat with the use of a soldering iron.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

On this particular model there is one capacitor from the video process IC (jungle IC) that supplies the Vertical pulse that shoul be changed.This is an easy repair if you've ever soldered and would not be too costly for a repair shop to do it for you. The problem is a bad Vertical Output IC (usually mounted on an aluminum heat sink with the part on it labeled LA78?? ) and 1 or 2 bad capacitors. Some times you can even fix the problem by re-soldering the contacts of the IC- To find the IC follow the 4 wires that come from the Yoke (which is a contained coil of wires slipped over the neck of the picture tube(s)) back to the board. 2 of the wires go to the horizontal o/p and 2 to the Vertical o/p the thinner gauge wires are for the vertical. Be sure to vote/rate me if this helped Thanks!

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